Chapter 18
| VLAN Commands
Configuring VLAN Interfaces
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â—† If a VLAN on the forbidden list for an interface is manually added to that
interface, the VLAN is automatically removed from the forbidden list for that
interface.
Example
The following example shows how to add VLANs 1, 2, 5 and 6 to the allowed list as
tagged VLANs for port 1:
Console(config)#interface ethernet 1/1
Console(config-if)#switchport allowed vlan add 1,2,5,6 tagged
Console(config-if)#
switchport forbidden
vlan
This command configures forbidden VLANs. Use the no form to remove the list of
forbidden VLANs.
Syntax
switchport forbidden vlan {add vlan-list | remove vlan-list}
no switchport forbidden vlan
add vlan-list - List of VLAN identifiers to add.
remove vlan-list - List of VLAN identifiers to remove.
vlan-list - Separate nonconsecutive VLAN identifiers with a comma and no
spaces; use a hyphen to designate a range of IDs. (Range: 1-4094).
Default Setting
No VLANs are included in the forbidden list.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
â—† This command prevents a VLAN from being automatically added to the
specified interface via GVRP
.
â—† If a VLAN has been added to the set of allowed VLANs for an interface, then you
cannot add it to the set of forbidden VLANs for that same interface.
â—† This command will not be accepted if the specified VLAN does not exist on the
switch.
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